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Avaliação do comportamento de uma estrada de baixo volume de tráfego em função do tempo
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Orientador(es)
Resumo(s)
As estradas não pavimentadas são o principal meio de ligação entre os grandes centros urbanos e as regiões com baixa densidade demográfica e zonas de montanha. Durante muitos anos foram realizados ensaios estáticos para estudar essas estradas, consistindo na aplicação de cargas de valor elevado para a rutura do solo, não representando o padrão real de carga devido à passagem de veículos. Assim, ensaios de carga dinâmica revelam-se mais representativos para simular tal carregamento. Os equipamentos de carga dinâmica possuem eficiência na transmissão da força, no entanto, possuem também grandes dimensões. Assim, foi desenvolvido na Alemanha um equipamento mais leve e de fácil transporte, o Light Weight Deflectometer (LWD), com o objetivo de realizar medições em zonas de difícil acesso, com maior rapidez e
agilidade.
Neste trabalho estudou-se uma estrada de baixo volume de tráfego (EBVT) nãopavimentada, que se encontra dentro do Parque Natural do Montesinho, no Conselho de Bragança, que recebe, desde veículos leves até veículos pesados. Avaliou-se os resultados obtidos pelo ensaio Light Weight Deflectometer (LWD), registrados em diferentes períodos de tempo, 2019, 2021 e em 2022. De seguida, adota-se o método das diferenças acumuladas da Associação Americana de Rodovias do Estado e Funcionários de Transporte (AASHTO) para decompor a estrada em secções de comportamento homogêneas. Por fim, faz-se um comparativo das secções resultantes, a fim de observar seus comportamentos em diferentes períodos, procurando um padrão logico de desempenho.
The unpaved roads are the main paths that connect large urban centers and regions with low population density and mountain areas. For many years, static tests were performed to study these roads, consisting in the application of high value loads for soil rupture, not representing the real load pattern of the passage of vehicles. Thus, dynamic load tests proved to be more representative to simulate those type of load. The dynamic load equipments are efficient in apply force, however, they also have large dimensions and sometimes are unworkable. Taking this into consideration, a lighter and easier to transport equipment, was developed in Germany, the Light Weight Deflectometer (LWD), with the objective of making measurements (modulus of deformability and CBR dynamics) in areas of difficult access, with a greater speed and agility. This work studied an unpaved low volume road (LVR) inside the Natural Park of Montesinho, at the Council of Bragança, that receives several types of vehicles, from light to heavier ones. In order to better evaluate the chosen road, the results obtained through the Light Weight Deflectometer (LWD), obtained in different time periods, 2019, 2021 and 2022 are used, and then, the cumulative differences method by the American Association of State Highway and Transportation Officials (AASHTO) is adopted to separate the road into homogeneous performing sections. Finally, a comparison of the resulting sections is made, in order to observe their behavior in different periods, looking for a logical pattern of performance.
The unpaved roads are the main paths that connect large urban centers and regions with low population density and mountain areas. For many years, static tests were performed to study these roads, consisting in the application of high value loads for soil rupture, not representing the real load pattern of the passage of vehicles. Thus, dynamic load tests proved to be more representative to simulate those type of load. The dynamic load equipments are efficient in apply force, however, they also have large dimensions and sometimes are unworkable. Taking this into consideration, a lighter and easier to transport equipment, was developed in Germany, the Light Weight Deflectometer (LWD), with the objective of making measurements (modulus of deformability and CBR dynamics) in areas of difficult access, with a greater speed and agility. This work studied an unpaved low volume road (LVR) inside the Natural Park of Montesinho, at the Council of Bragança, that receives several types of vehicles, from light to heavier ones. In order to better evaluate the chosen road, the results obtained through the Light Weight Deflectometer (LWD), obtained in different time periods, 2019, 2021 and 2022 are used, and then, the cumulative differences method by the American Association of State Highway and Transportation Officials (AASHTO) is adopted to separate the road into homogeneous performing sections. Finally, a comparison of the resulting sections is made, in order to observe their behavior in different periods, looking for a logical pattern of performance.
Descrição
Palavras-chave
Estradas de baixo volume de tráfego Comportamento geotécnico
Contexto Educativo
Citação
Kolodi, William; Minhoto, Manuel; Morais, Hermínia; Paula, António Miguel (2023). Avaliação do comportamento de uma estrada de baixo volume de tráfego em função do tempo. In 18 Congresso Nacional de Geotecnia. Évora. p. 845-854. ISBN 978-989-54038-9-9